Cop holding device for loom shuttles



April 23, 1935- I w. L. DAVIS ET AL 1,998,433

COP HOLDING DEVICE FOR LOOM SHUTTLES Filed Oct. 24, 1932 Patented Apr. 23, 1935 Wired srarss cor HOLDING DEVICE .FORLUGM snc'rrLss Waldo L. Davis, Hopedale, and Daniel M. Chase,

Wilkinsonville, Mass.

Application October 24, 1932, Serial No. 639,254

1 Claim.

This invention relates to loom shuttles provided with spindles on which-cops or tubes of paper or similar material may be placed. In modern high speed looms, the repeated abrupt checking of the shuttle has a strong tendency to loosen the cop on the spindle, causing weft breakage and stoppage of the loom.

' It is the general object of our invention to provide means by which the cops may be more effectively held on the spindles, while at the same time they are readily removable therefrom without injury to the cops.

A more specific object is to provide an expanding type of cop spindle with a pad or portion of rubber or similar frictional cushion material, which material will be brought into holding engagement with the cop by the expanding action of the spindle and which material will be Withdrawn from such engagement on contraction ofthe spindle.

Our invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of our invention, together with certain modifications, is shown in the drawing, in which Fig. 1 is a partial sectional side elevation of a shuttle embodying our improvements;

Fig. 2 is a view similar to Fig. l but showing the parts in a different position;

Fig. 3 is a partial plan view of the spindle, looking in the direction of the arrow 3 in Fig. 2;.

Figs. 4, 5 and 6 are side elevations of spindles embodying modified forms of our invention, and

Fig. '7 is a detail plan View, looking in the direction of the arrow I in Fig. 6.

Referring to Figs. 1 to 3, we have shown a shuttle S having a spindle iii of the expanding type and provided with a main part if and a resilient movable portion or feather E2. The spindle it is pivoted on a cross stud it fixed in the body of the spindle and is mounted to swing in a vertical recess 55 in the shuttle body.

A flat spring ll acts on the upper part of the spindle butt and holds the spindle yieldingly in the open position shown in Fig. 2 or the closed and operative position shown in Fig. 1. When the spindle is swung upward to open position, 50 as shown in Fig. 2, the end of the spring ll engages a beveled portion I8 on the end of the feather l2 and forces the feather toward the main part i i of'the spindle, thus contracting the spindle.

As the spindle is swung downward to operative position, the feather E2 is released and springs upward, thus in effect expanding the spindle within the cop C. A cross pin it (Figs. 1 and 2) is engaged by a depending portion 2i on the spindle it and acts as a stop for definitely positioning the spindle in horizontal or operative position.

In the preferred form of our invention, the expanding portion or feather E2 of the spindle It is recessed as indicated at 2A in Fig. 3 to receive a sleeve or tube of resilient cushion material such as soft rubber. This cushion material preferably extends slightly beyond the normal engaging surface of the feather IE but does not extend sui'liciently to interfere with application of a cop when the spindle iii is raised and contracted.

When the spindle is thereafter swung downward to operative position. however, the rubber sleeve or tube 25 is pressed outward against the 1 inside of the cop in a firm frictional engagement which securely holds the cop from axial displacement on the spindle. When the cop is to be re- I moved, the spindle is swung upward and isthereby rubber to the spindle feather may be varied, as

shown for instance in Figs. 6 and 7, in which a rubber thread 36 is laced into a series of holes in the spindle feather 32. With this construction, the rubber is even more securely held in place than in the form previously described.

In Fig. 4 we have shown a rubber tube or sleeve mounted in a recess 36 near the base of the main spindle portion 3?. When the feather is released, the spindle expands as usual and the cop C is forced against the sleeve 35, the operation being substantially as previously described.

The method of application of the rubber tube to the spindle is somewhat more simple, however, in the construction shown in Figs. 1 to 3, as in that construction the tube may be easily slipped over the free end of the feather.

In the construction shown in Fig. 5, we have provided recesses 0 and ii in both portions of In this case, as the spindle expands the rubber sleeve 42 is stretched until it firmly engages the I cop C.

In each form of theinvention, it will be seen that a frictional surface of rubber or other suitable cushion material is provided, which surface is withdrawn during the application or removal of the cop but is moved outward by the expansion of the spindle to firmly engage the cop as the spindle is moved to operative position.

The invention has been found extremely satisfactory in use and eifectively prevents axial displacement of cops in modern high speed looms. Furthermore, the inside of the cop is not injured by its application to or removal from the spindle, and the cops may be used repeatedly, thus reducing the expense of loom operation.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what we claim is:-

In a loom shuttle, an expanding two-part copholding spindle, means to cause expansion and contraction of said spindle, and a portion of rubber tube having a soft compressible surface encircling one only of the two relatively movable parts of said spindle so that the spindle backs it up and positioned thereon to engage the inner surface of a paper cop as said spindle expands, said spindle part being recessed to provide a depressed seat for said rubber tube portion.

7 WALDO L. DAVIS.

DANIEL M. CHASE. 

